Mac OS X users need to copy only the Sims folder, update.conf, and HDS-4.1.36.68.upd file to their SD/MMC card.

What changes are made in this update?HDS 4.1 includes many new features including:

Sonar Performance – Improvements include better bottom tracking at high speeds, enhanced deep water depth tracking (greater than 1,000 feet), and shortened lock on time for trolling motor mounted transducers.

Charting Enhancements – Quick access mapping selection is now available with Lowrance/Navionics chart toggle under Chart Options or soft key accessible on HDS-8 and HDS-10. Also, users can now display points of interest supplied by the Navionics User Community.